Department of State vs DoS

Department of State and DoS both are nouns.

Word	Noun	Adjective	Verb	Adverb
Department of State	Yes	No	No	No
DoS	Yes	No	No	No

As nouns, Department of State and DoS are synonyms defined as:

Department of State and DoS: the federal department in the United States that sets and maintains foreign policies

Other synonyms of Department of State include State, State Department, United States Department of State.

Department of State (noun)	DoS (noun)
the federal department in the United States that sets and maintains foreign policies	the federal department in the United States that sets and maintains foreign policies